Improvement in hoisting and dumping apparatus



2 Sheets-Sheet 2 W. S CHERRY.

P HoISTPN'G ANPDUMPING APPAPJLTUS;l No.176,738. Patented May 2,1876.

P N-FETERS, PHGTO-LITHOGRAPHER. WASHING 0N D C lbearings resting uponblocks b" vb.

UNITED 'Sfrn'rns Aram* Carros.,A

WILLIAM s. CHERRY, or s'IRnA'ron, ILLINOIS.

IMPROVEMENTIN HoisTlNG AND DUMPING APeAnATus.

Specication forming part of Letters Patent No. 176,738, dated May 2,1876; application filed l December 2, 1815.

To all lchem 'it may concern:

Beit known that I, WILLIAM S. CHERRY, of Streator, inv the vcounty of LaSalle and State of Illinois, have invented a new and use- My inventionis intended for use at coal. mines and elsewhere, for the purpose ofhoist' ing coal-cars, and dumping their contents with ease and safety.

-The invention consists, of supporting and guiding the tilting platformon which the car is placed; second, in a guard extending over the wheels0f the car to-prevent its rising; third, in devices for opening the doorof the car automatically; and, fourth, in certain devices by which thecage is supported and attached to the hoisting rope, whereby safety issecured in case of accident.

In the drawings, `A and A' represent lthe base and upright portion ofthe frame, which is necessary to support and guide the hoist ingapparatus. Within this frame, and at the corners thereof, are secured,in anysuitable manner, guide-strips a a, vand a a', the latterbeingshorter than the former, and terminating just below the upper endofthe chute A. B is the hoisting-cage, the side piece b b of whichembraces the guide-strips c a, which are located about midway of themain frame, to which they are properly secured. A platform, B', issupported on a rockshaft, b', which extends across the lower end of thecage, and gas he platform is raised considerably above the shaft bymeans of plates C C, to which it is secured, and by which it issupported on the shaft b. At the four corners of the platform areattached small. rollers c c, which bear against the guidefpieces a a anda c', to serve as guides and relieve friction when the cage first, inthe method is raised and lowered. Uponthe platform is placed a suitabletrack for the reception of the car D, and also a springfcatch, d, anotch in Which engages with a projection, d', on the bottom of the car,and thus holds the latter from moving back and forth on the platform.GruardsD` D are provided on each side of the platform, which extendupward as high/as the car-wheels, and are then turned inward andextended over the wheels, so as to preveut the raising of the car whenthe platform is tilted. The front end or door of the car is secured by abar, d, which is pivoted thereto, and the ends of which are secured bynotched keepers d" attached to each side of the car. At one side the bard projects considerably beyond the car, so that it will engage with theinclined plate a/, which is attached to one of the corner posts A insuch a position that it will release the catch as the'car is tilted todischarge its load. ,To each of the side pieces b of the cage B ispivoted, upon the inside thereof, a dog, @,the lower ends of which areprovided with a projection extending outward through slots in the piecesb, so as to bite against the guide-piece a al' on each side thereof; theends of the dogs being beveled, so as to present a sharp edge for thispurpose. To the outer ends of these dogs are attached springs e of anysuitable construction, the lower ends ofwhich are fastened to staples c"in the side pieces of the cage b b. Rods fare also attached to the outerends of these dogs, which are carried upward through the top of thecage, and are inclined toward each other, their upper ends being broughttogether about midway of the cage, and attached to the ends of a bar, E,as seen in Fig. 2.

To the four upper corners ofthe cage are attached rods F, which arecarried upward` and inward, and hooked to a disk, G, over the center ofthe cage. To the ends or" the barvE are attached rods E', whichareinclined upward and inward, and are fastened to a disk, H, just belowthe disk Gr. These disks have holes, through which the rod g passes, andthis rod has a screw-thread cut upon it, and is provided with threadednuts h h', one of which is located below each of the disks G and El'. To

the upper end of the rod g the hoisting-rope I is attached, which passesover a pulley, I', at the top of the main frame.

The operation of my machine is as follows, viz: The center ofthe car,when the latter is driven upon the platform, is carried a little iorwardof the shaft b', so that the center of gravity of the platform and carwill be outside of the shaft. The guide-pieces aa, against which Ythefriction-rollers on the platform bear, prevent the latter from tilting;but when the rollers on the front end of the platform have reached theupper ends of the short guidepieces a', there is no longer anything toprevent the tilting ofthe platform with its load, and the center ofgravity being forward of the shaft, the platform is tilted, as seen inFig. 3, and the door having been released by the action of the inclinedplate a upon the bar d the coal is discharged upon the chute. When thesprings c act With their full force upon the dogs e, they cause thelatter to bite so sharply against the guide-pieces a as to hold the cagefirmly in position Wherever it may be, and even heavily loaded; but thedisks G and H are so adjusted relatively to each other by means of thescrew-nuts h that, when the cage is being elevated by the rope I, thepull upon the disk His just sucient to release the dogs from the postsa, this result being accomplished by means of the rods E and f, whichform a directrconnection between the disk H and the dogs. If, however,an accident occurs, such as the breaking of the hoisting-rope, thestrainv upon the disk H being suddenly relieved, the springs e bring thedogs into action instantaneously, and the cage is stopped and securelyheld from descending.

It will thus be seen that my invention is not only a hoisting anddumping apparatus, but also a safety-cage.-

and inclined plate or stop a, substantially as and for the purpose setforth.

5. The combination of the dogs e, pivoted to the sides of the cage, theguide-posts a, and the springs e', constructed and operatingsubstantially as and for the purposes set forth.

o. rIhe combination, substantially as described, of the dogs e, springse', rods Ef, and Y hoisting-rope I, for the purpose set forth.

7. In a hoistin gapparatus, the combination, substantially as described,of an elevatingdevice and a safety attachment, the latter beingadjustably connected to the former, for the purpose set forth.

8. The combination, substantially as described, of the dogs e, rods fand E', adjustable disk H, and draft-rod g, provided With screw-nut h',for the purposes set forth.

9. The combination, substantially as 'described, ofthe rods F, attachedto the cage,

rods E and f, attached to the dogs e, disks G and H, and draft-rod g,provided Wit-h screw-nuts h h', for the purposes set forth.

WILLIAM S. CHERRY.

In presence of- R. D. FLETCHER, FRANCIS MURPHY.

